I have come from the dark side.

I've been an iOS user since forever, but needed the change. Also coming from Verizon, so I'll be curious about the AT&T experience. (I live in an area with good service)

First impressions:
-Can't believe how "snappy" the WP ecosystem feels.
-Camera is legit. I am such an amateur, though, that I'm going to really need to take advantage of the tutorials.
-Screen, even if not considered "Full HD," is beautiful and crisp.

Questions:
-What are some good Apps for customizing my start screen/live tiles? I've seen some really neat home screens on this site. Curious as to how some of you folks did it.
-How do I find/access/utilize the large/RAW photo file to fully utilize that massive sensor? (I know I can't/shouldn't use these on facebook/instagram, etc., btw)
-Suggestions for any and all Apps (Thinking weather, YouTube, Social Media, Education, etc).

Customizing live tiles: this may help
To learn what to do with your RAW files, read the following: Shooting in RAW with your Nokia Lumia PureView Camera | Windows Phone Central
As far as suggestions for apps: first, if you're eligible for a $20 voucher to the windows app market you should get that sent off. Then, here are some of the apps I've got: Fotor, WPCentral, Amazing Weather HD, Phototastic, Nextgen Reader, Music Import, YoutubeHD, 6tag, 6sec, 6snap, cool tiles, sozoom, Fantasia Painter and proshot

I've been an iOS user since forever, but needed the change. Also coming from Verizon, so I'll be curious about the AT&T experience. (I live in an area with good service)

First impressions:
-Can't believe how "snappy" the WP ecosystem feels.
-Camera is legit. I am such an amateur, though, that I'm going to really need to take advantage of the tutorials.
-Screen, even if not considered "Full HD," is beautiful and crisp.

Questions:
-What are some good Apps for customizing my start screen/live tiles? I've seen some really neat home screens on this site. Curious as to how some of you folks did it.
-How do I find/access/utilize the large/RAW photo file to fully utilize that massive sensor? (I know I can't/shouldn't use these on facebook/instagram, etc., btw)
-Suggestions for any and all Apps (Thinking weather, YouTube, Social Media, Education, etc).

The large photo file you can find by connecting Your mobile to Your PC. You can find it via Windows Explorer inside Pictures album of Your Windows phone. Another alternative is to allow skydrive to sync / upload Your large files. See settings > synchronization.